Fixed version numbers used for the 'since' annotation indicated in docblocks.
Added a blank line to give a margin between change log items.
Added a utility class for checking requirements.
Added isset() check so that the user can omit checking particular items by removing those requirement array arguments.
Made it easier to skip some items from checking requirements.
Added plugin deactivation handling.
- Advanced the version number to help identify the changes.
- Generated the minified version.
Updated inline documentation regarding the 'system' field type.